Circuit arrangement for controlling very rapid deflections of an electron beam in a vacuum tube

Claim 1

A CIRCUIT ARRANGEMENT FOR ELECTROMAGNETICALLY CONTROLLING VERY RAPID DEFLECTIONS OF AN ELECTRON BEAM IN A VACUUM TUBE, COMPRISING TWO IDENTICAL FIELD COILS, DISPOSED FOR PUSH-PULL ACTIONS ON SAID ELECTRON BEAM, A MAIN D-C VOLTAGE SUPPLY, TWO DIODES CONNECTED TO SAID MAIN SUPPLY AND TO RESPECTIVE FIRST ENDS OF SAID FIELD COILS FOR PASSING CURRENTS THERETHROUGH, TWO ELECTRONIC CONTROL DEVICES WITH CONTROL ELECTRODES, ON WHICH RESPECTIVELY TWO BALANCED CONTROL SIGNALS ARE IMPRESSED, SAID ELECTRONIC CONTROL DEVICES BEING RESPECTIVELY CONNECTED TO SAID FIELD COILS FOR SIMULTANEOUSLY INCREASING THE CURRENT THROUGH ONE AND DECREASING THE CURRENT THROUGH THE OTHER OF SAID FIELD COILS, AN AUXILIARY D-C SUPPLY HAVING A VOLTAGE SUPERIOR IN ABSOLUTE VALUE TO THAT OF SAID MAIN SUPPLY, TWO SWITCHING TRANSISTORS WITH THEIR RESPECTIVE EMITTER-COLLECLTOR PATHS BEING INSERTED BETWEEN SAID AUXILIARY SUPPLY AND SAID RESPECTIVE FIRST ENDS OF THE FIELD COILS, AND LOW RESISTANCE D-C CONNECTION MEANS INSERTED BETWEEN THE SECOND END OF EACH ONE FIELD COIL AND THE BASE OF THE SWITCHING TRANSISTOR CONNECTED TO THE FIRST END OF THE OTHER FIELD COIL, WHEREBY ONLY THE TRANSISTOR CONNECTED TO THE ONE FIELD COIL HAVING AN INCREASING CURRENT THERETHROUGH AND THE DIODE CONNECTED TO THE OTHER FIELD COIL ARE TRANSIENTLY CONDUCTIVE, AND THE FIRST END OF ONLY SAID ONE FIELD COIL IS BROUGHT THEREBY TO A VOLTAGE SUPERIOR IN ABSOLUTE VALUE TO THAT OF THE MAIN SUPPLY.